Question

It takes 10 workers 10 days to paint 10 houses. How many houses can five workers paint in five days?

Answer 1

10 workers paint 10 houses in 10 days.

So . . . 10 workers paint 1 house a day.

So . . . 5 workers paint 1/2 house per day.

So . . . The same 5 workers can paint (5 x 1/2) = 2 and 1/2 houses in 5 days.